Improvement in watch-makers  lathes



J'. KBSSELMBIER. Watohmakwersf Lathe.

Patented Oct. 7,18759.

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N. PETERS. PHOTO LITHOGHAP Specification forming part PATENT OEEIoE.

JOSEPH KESSELMEIER, OF GAIJION, OHIO.

IMPROVEMENT |-N WATCH-MAKERS LATHES.

s lfatent No. 220,291, dated October 7, 1879; application led June 10, 1879.

To all whom it may concern:

Be it known that I, J osEPE KEssELMErER., ot' Galion, in the county of Orawt'ord and State ot' Ohio, haveI invented certain new and useful Improvements in Watch-Makers Lathes;

, and I do'hereby declare th'ifollpwiug to be a full, clear, and exact description ofthe inven- 'tion, such as will enable others skilled in the art to which it pertains to make and use it,

reference being had to the accompanying drawings, which form part of this specification.

My invention relates to a new and useful improvement in lathes designed more especially7 for jewelers lathesand such as are designed for fine work, though equally well adapted for anygotherz kind of turning-lathes.

vF.My invention consists in the peculiar construction and combination of parts in a lathechuck, as will be hereinafter described, a'n'd `pointed out in the claims, whereby a devicem when fastened in` a chuck, may be centered by simply bringing a tool or other object against its outersurface, the loose chuck sliding within the head until the device is yaccurately centered, at which time the chuck is securely clamped bya set-screw working through `the end of the spindle. l

In the` drawings, Figure l is a longitudinal central section of a lathe-spindle and chuck embodying my invention. Fig. 2 is aview looking against the endoijthe chuck. Fig. 3 is an end view ands hn', representing attachments to the chuck", 1Fig. 4., a similar view, representing` other attachments. Fig. 5 represents still another attachment to the lathechucl j totore lathes have ordinarily been `made with various forms of positive mechanism for centering. the article to be turned or drilled; but all such positive mechanisms are practically incapable of adjustment to au accurate center; and the object of my invention is to produce a chuck which shall accurately center the article by bringing a tool or other device to bear upon it, thereby adapting it for the nice adjustmentrequired in jewelers lathes, and for other similar nice work.

Inthe said drawings,iAis any suitable latheframe, which, however forms no part of my invention. B is the spindle. The spindle B is provided with an enlarged head, B1, screw- 4cut to receive a suitable cap, C, so that the head B1, together with the cap, form a recessed head for the spindle. B2 is a loose plate, with its flanged portion b2 projecting beneath the cap O into the recess b. The plate B2 being smaller than the interior of the cap O, and the portion which projects through the cap being smaller than the orifice through which it projects, this plate B2 will, therefore, have a free motion, and may slide in any direction within the head. B3 is another plate, which rests between the plate B2 and the head B. It serves the purpose'simply of a snug backing to receve-the wear occasioned by the plateB?, and to distribute the pressure upon the said plate B2. B4 is a small washer, against which the spring b4 bears, which spring gives suftipient ,friction to the different parts that they" will lturn with the lathe-spindle, yet will yield to the pressure of a tool or other device in centering the article chucked. D is a follower, against which the tightening-screw E bears. E is a suitable hand-wheel for tightening the chuck.

The operation is very simple, and .is as follows: Suppose a device to be turned or drilled is properly secured in the jaws or vise shown in Fig. 3. This vise is provided with ashank, f, which is adapted to screw' into a screwt-apped orifice, in the movable plate B2. The vise having been thus attached to the chuck, the spring b4 will, by its pressure against the plate B4, cause sufficientfriction between the plate B2 and the cap O that the vise will be caused to turn with the spindle; yet the friction is not so great but that the operator, by bringing a tool or other suitable device -against the article to be turned, may cause the plate B2 to slide so as to accurately center the article in the chuck. When thus centered aturn upon the tightening screw E will bind the parts snugly together and hold them in place.

j 1n Fig. 3 is shown an ordinary vise, consisting of the frame F, provided with themovable jaws Fl and set-screw F2, there being a screwshank, f, to t the orilice'f in the plate B2.

In Fi g.` 4 is shown another form of vise adapted for holding certain parts to be turned or drilled. This consists of au annular ring or frame, G', provided with screws gl, for holding the device in place. The frame is adapted to be inserted into a frame, G, where it is held in place by the set-screws g setting in over the ange g2. The frameG is provided with the screw-shankf, adapted to fit into the orifice f in the plate B2.

As shown in Fig. 4, various forms of primary clamp or vise are represented. They may be formed as shown at G; or, for other kinds ot' work, I may use a clutch such as is shown atH, which represents ai'rame or support having two sliding jaws II'. The jaws 1I1 have formed upon their edges a number of openings, each corresponding with different sizes ofl articles to be clamped between them. These circular jaws H may be turned about their pivots h', so as to bring any size of opening into operation.

Suitable set-screws H2serve to force the jaws together. This clutch is like the clutches G formed t0 set into the fraIne(,in which it may be clamped by the clamp-screws g, and be attached to the plate B2.

In Fig. 5 is represented an ordinary lathejaw, which is likewise provided with the screwshank j'.

I do not limit myself to the precise form shown,nor to the num ber of clutch attachments thatmaybecm ployed; but 1 have simply shown a number of them in order toindicate its general adaptation for all purposes, especially' as a jewelers lathe.

This lathe is well adapted for all purposes for which a lathe may be employed, whether upon a large scale or upon a small scale, but is more especially adapted to lathes for fine work-as, for instance, jewelers and watchmakers lathes.

What I claim is- 1. The combination, with the hollow spindle B and threaded rod E, ot' the head B',cap U, plates B2 B, and spring b", substantially as set forth.

2. The combination, with the hollow spindle B, threaded rod B', and cap C, of the plate B2, provided with a threaded hole for the attachment of a chuck, said plate being secured between the cap and head, and adapted to be moved radially and secured in desired position by the threaded rod E and a plate bear ing against the side of plate B2, substantially as set forth.

3. The combination, with a hollow spindle B, threaded rod E, and spring 114,015' a recessed head fastened to the end of the hollow spindle, cap C, and a plate, B2, located between said recessed head and cap, and adapted to be moved radially therein and secured in any desired position by the screw-threaded rod E and plate B3, interposed between the end of rod E and plate B2, the latter provided with a threaded hole for the attachment of a chuck, substantially as set forth.

4. The combination, with a hollow spindle, B, threaded rod E, and spring b", the latter surrounding the end of rod E., of a recessed head secured to the end ot' the hollow spindle, the cap U, a plate, B2, located between said recessed head and cap, and adapted to be moved radially therein, said plate being provided with a threaded hole for the attachment ot' a chuck, and a plate, B2, for distributing the pressure ot' the screw-threaded rod E upon plate B2, substantially as set forth.

5. The primary clamping device H, provided with the circular multiple jaws H', and adapted to it into a clutch, G, whereby it may be attached to the plate B2, substantially as and for the purposes described.

In testimony whereof I have signed my name to this specitication in the presence ot' two subscribing witnesses.

1t. W. JoHNsroN, EDWARD Holm. 

